When I saw woolwax had a thinner, I ordered it with everything else. Not sure how the result of thinning it compares to fluid film though. I have not tried the thinner yet, or fluid film, but I will be trying the thinned woolwax in the panels soon.Late to the discussion but I have been using lanolin based products on my vehicles for years now. First starting using fluid film about 15 years ago. I switched over to woolwax about 4 or 5 years ago. I use woolwax on the underside of vehicles and fluid film in the body panels. Fluid film creeps better so its good for pinch seams in doors and things like that. Woolwax hold up better to the road spray than fluid film does.